Put my cell # on the No Call List before it was activated. No land line for about 12 years now. What for? And I don't give that # out.
There are a few that get through on my work phone, and I mess with them if I have the time. Act real interested, get everybody all exited...
Then make my "needs" rather confusing. Supervisor gets involved, and guess what? Waste more than 10 minutes, and they never call back.
Watch Crank Yankers for Inspiration.